Melissa Bonkoski, 38, was a science teacher and coach at Owen J. Roberts High School in South Coventry Township until August 2017. She resigned during the investigation, according to Chester County District Attorney Tom Hogan.

“Rule No. 1 if you are a teacher or a coach: Do not have sex with a student. Breaking this rule is a one-way ticket to arrest, losing your job, and prison. Not to mention the profound damage to the victim and the school community which you were entrusted to serve,” Hogan said.

The DA’s office said the victim was a 16-year-old freshman when he was in Bonkoski’s class.

“The investigation was triggered when the victim’s girlfriend discovered suspicious texts from the defendant to the victim,” the DA’s office said. “The defendant had purchased a disposable ‘burner’ phone only for communications with the student.”

According to the affidavit, the victim told police that he and Bonkoski did have sexual intercourse at her home. The victim said he was 16 at the time.